Case-IH® & New Holland® Compatible Standard Vertical Unload Gearbox Rebuild Kit
Restore the drive performance of your unloading system with this premium C&M Australian-assembled vertical unload auger lower gearbox rebuild kit. Specifically engineered for CNH Flagship Axial-Flow, CR, and CX combine harvesters equipped with the standard speed unloading gearbox, this kit provides an economical alternative to purchasing a complete new gearbox assembly.
A common failure point in these gearboxes is wear on the output pinion shaft and bearings under constant load. This exclusive C&M kit allows you to refurbish the output pinion shaft side of the gearbox (OEM # 84320052) for a fraction of the cost. Featuring a 21-spline shaft with circlip groove and genuine Timken bearings, this extended wear solution ensures a longer service life and keeps your grain handling system in top condition.
CNH Standard Gearbox OEM Cross-Reference
Refurbishment Solution for Gearbox Number: 84320052
| Part Number |
Description |
Qty |
| 86623219 |
Output Shaft (21-Spline Standard Speed) |
1 |
| 86626475 / 87555831 |
Genuine Timken Taper Roller Bearing Assemblies |
2 |
| 86613758 |
Tapered Roller Bearings 30308 |
2 |
| 86623221 / 86623230 |
Precision Seal Kit (Various Sizes) |
Set |
| 86623216 / 86566099 |
Precision Shim Kit and Flange Screws |
Set |
Model Compatibility & Fitment
Gearbox Rebuild Compatibility: CNH Axial-Flow, CR & CX Models
| Brand / Series |
Models |
Reference |
| Case-IH® Flagship & Mid-Range |
10, 20, 30, 40, 50 & 88 Series Axial-Flow |
Standard Speed Only |
| New Holland® CR Series |
CR6.80–CR9.90, CR9000 Range, CR900 Range |
Standard Speed Only |
| New Holland® CX Series |
CX8.80, CX8.90, CX8000 Range, CX800 Range |
Standard Speed Only |
Technical Specifications & Features
- Manufacturer: Proudly assembled in Australia by Collier & Miller (C&M).
- Shaft Profile: 21-Spline output shaft featuring a precision circlip groove.
- Bearings: Includes premium Timken Tapered Roller Bearings for maximum reliability.
- Value: Cost-effective repair kit that avoids the need for a complete gearbox replacement.
- Precision: Includes 86623216 Precision Shim Kit for accurate backlash adjustment.
- Dispatch: Available for fast Australia-wide shipping from Collier & Miller.
Expert Maintenance Review
The vertical unload auger lower gearbox is a critical link in the grain handling system. Because it operates under high torque, seal degradation can lead to oil loss and subsequent overheating of the internal gears and bearings. We recommend inspecting the pinion shaft flange for oil leakage and checking for shaft play during every preventative maintenance check.
Utilising this high-performance rebuild kit allows you to restore the high-strength integrity of the gearbox output side. Replacing the bearings, seals, and shaft as a matched set ensures a precision fit, preventing the vibration and gear noise often found in worn assemblies. This extended wear solution provides a longer service life for your machine, ensuring efficient unloading throughout the season.
Installation Tip: Shim for Performance
When rebuilding the pinion shaft side of the gearbox, correct shimming is essential to ensure proper bearing preload and gear backlash. Using the provided shim kit, verify that the gears mesh smoothly without binding. An incorrectly shimmed gearbox will generate excess heat, which can compromise the service life of even the highest quality Timken bearings.